SQL 查詢包含 / isabout 在 SQL Server Management Studio 中完美運行，但它不在代碼后面

Question

我想問我做錯了什么。 我有這個查詢在 SQL Server Management Studio 中完美運行：

select * 
from products, containstable(products, prod, 'isabout("laptop anybrand" weight (1))') as resultado 
where products.ImageIDS = resultado.[Key] 
order by resultado.[Rank] desc

但是當我將它放入代碼隱藏時，它不起作用，並且是這樣的：

select * 
from products, containstable(products, prod,'isabout(" + searcht.Text + " weight (1))') as resultado 
where products.ImageIDS = resultado.[Key] 
order by resultado.[Rank] desc

調試器沒有發送任何錯誤，但它不起作用，接下來我發布我正在使用整個查詢的代碼：

Private Sub BindGrid2()
    Dim use As SqlConnection

    use = New SqlConnection("Data Source=DESKTOP-50SIV8B\SQLEXPRESS;Initial Catalog=cupon2; User ID=XXXX; password=XXXX")
    use.Open()

    Dim queryy As String = "select * from products, containstable(products, prod,'isabout(" + searcht.Text + " weight (1))') as resultado where products.ImageIDS = resultado.[Key] order by resultado.[Rank] desc"

    Dim DAA As SqlDataAdapter = New SqlDataAdapter(queryy, use)
    Dim DTT As New Data.DataTable

    searchid.Text = ""
    subc.Items.Clear()
    ids.Items.Clear()

    DAA.Fill(DTT)

    gv2.DataSource = DTT
    gv2.DataBind()

    use.Close()
End Sub

希望任何人都可以幫助我有什么問題。

謝謝！

Answer 1

查看 SSMS 查詢中的此字符串文字：

'isabout("laptop anybrand" weight (1))'

請注意，文字本身包含搜索鍵周圍的雙引號。

現在看一下VB的摘錄：

'isabout(" + searcht.Text + " weight (1))'

這里有雙引號，但它們不是最終查詢的一部分，並且代碼中沒有任何內容可以確保添加它們。

您應該做的是像這樣更改 SSMS 版本：

DECLARE @SearchKey nvarchar(50) = N'laptop anybrand'
SELECT ... containstable(products, prod, N'isabout("' + @SearchKey  + '" weight (1))')

您可能必須在 SSMS 中使用它來讓它再次工作，但是當它在 VB 中做同樣的事情時。 請注意我添加的評論：

'Move all your database code into it's own module!
Friend Module DB
    Private connectString As String = "Data Source=DESKTOP-50SIV8B\SQLEXPRESS;Initial Catalog=cupon2; User ID=XXXX; password=XXXX"

    Public Function SearchProducts(searchKey As String) As DataTable
        'String literals can be more than one line now
        Dim query As String = "
SELECT * 
FROM products p
INNER JOIN containstable(products, prod,'isabout("" + @SearchKey + "" weight (1))') as resultado 
    ON p.ImageIDS = resultado.[Key] 
ORDER BY resultado.[Rank] DESC"

        Dim result As New DataTable()
        'Using blocks guarantee the connection is closed, **even if an exception is thrown!**
        Using cn As New SqlConnection(connectString), _
              cmd As New SqlCommand(query, cn), _
              da As New SqlDataAdapter(cmd)

             'Parameterized queries stop lots of bugs, hackers, and are **faster**
             cmd.Parameters.Add("@SearchKey", SqlDbType.NVarChar, 50).Value = searchKey
             da.Fill(result)
        End Using
        Return result.Tables(0)
    End Function
End Module

Private Sub BindGrid2()
    searchid.Text = ""
    subc.Items.Clear()
    ids.Items.Clear()

    gv2.DataSource = DB.SearchProducts(searcht.Text)
    gv2.DataBind()
End Sub

Answer 2

感謝您的回答，它是完整的，但我找到了一個更簡單的解決方案。 這是：

String.Format("select * from products, freetexttable(products, prod,'isabout({0}{1}{2} weight (1))') as resultado where products.ImageIDS = resultado.[Key] order by resultado.[Rank] desc", """", searcht.Text.Trim(), """")